A mechanism is described for employing and facilitating a thumb sensor at a computing device. A method of embodiments of the invention includes extending a touch panel of a computing device into a flap of the touch panel to be used as a side sensor of the computing device, and sensing a use of the side sensor, the use including touching of the side sensor by a user, where sensing may include detecting a change at one or more intersecting points of a plurality of intersecting points of conductive lines. The method may further include facilitating an action in response to the use of the side sensor.